If she just turned 21, there is a chance she could be a half sibling instead of a step. She could have been the first child that her dad and his mom shared. There is a 16 year difference between them, unless you want to say that his mom didn't meet her dad until she was older? I'm good either way really. But yes, either way they're relationship could be better. He came home during holidays when he was in college and as much as he could when he was with the Patriots early on in his career.